As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VENT AVIONICS SYSTEM FAULT AND VENT SKIN VALVE FAULT NOTED ON ECAM ON TAKEOFF, OVERIDE WAS UNSUCCESSFULL. THE AIRCRAFT RETURNED TO CLT AND AN EMERGENCY WAS DECLARED.THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. REPLACED SKIN AIR OUTLET VALVE (22HQ) IAW AMM 21-26-53-400-002A. AIRCRAFT WAS GROUNDED